Valve control for carburetors



Sept. 2. 1924.

A. G. REDMQND VALVE CONTROL FOR CARBURETORS Original Filed March 6',1917 Patented Sept. 2, 1924.

UNITED STATES 1,507,088 PATENT 'osrlcs.

ALBERT G. BEDIOND, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO MARVEL CABBU-RETOB COKPANY,.OF FLINT, MICHIGAN, A. CORPORATION OF INDIANA.

. VALVE CONTROL FOR CABBUBEIORS.

Original application fled Iarch 6, 1917, Serial 1T0.

152,707. Divided and this application filed October 23, 1917. Serial No.198,046.

To all whom it may concem:

Be it known that I, ALBERT G. RnDMoNn, a citizen of the'United States,residing at Indiana olis in the county of Marion and 5 StateInd1ana,'have invented certain new and useful Improvements in. ValveControls for Carburetors, of which the following is a specification,reference being had therein to the accompanying drawing. 10Thisinvention relates to certain new and useful improvementsincarburetors, and more particularly to means for controlling thesuction-controlled valve, and comprises a division of my applicationSerial No. 16 152,707, filed March 6, 1917. The ob'ect being to providea construction of car uretor in which a high and low speed nozzle isemployed for properly mixture in accordance wit t e speed of the 20motor to which the carburetor is attached.

' Another object of the invention is to provide a carburetor which isexceedingly simple and cheap in construction, the parts bein so arrangedthat they can be readil' as reac ed for -'repairing the same, the bigspeed nozzle being protected by a suctioncontrolled valve normally heldin closed position and adapted to be open by the 1ncreased suction whenthe motor to which the so carburetor is attached exceeds a certainspeed.

Other and further objects and advantages of the invention will behereinafter set forth and the novel feattres thereof defined at by the aended claims.

In the Y awings, Figure lis a rspective view of my improved constructionof carburetor.

. Figure 2 is a'transverse vertical section 40 through the same; and

Figure 3 is a detail elevation of a portion of the carburetor showin therocker arm and springlfor retarding e o 'ning movement of t esuction-controlle valve.

parts in the several fi res of the drawin s. In the drawin 1 in 'catesthe body of te carburetor whic is provided with a mixing chamber 2terminatin in a tubular portion 60 3 which is provided with a flange 4to facilitate its connection with the. manifold of the I motor saidtubular ortion having a throttle valve 5 moun therein carrie by r0ortioning the Like numerals of reference refer to like astem 6 which isprovided at its outer end with a double crank 7' for controlling theposition of the throttle through the usual connection of the throttlecontrol. The stem 6 carries a sleeve 7 which is provided with spacedlugs 8 adapted tocooperat'e with a stop lug 9 for positioning thethrottle valve in its open and closed position one of the lugs beingprovided with an adjustable screw 10 which enables the valve to be setso as to only partially close the tube.

The body of the carburetor is provided with a laterally extending airpassage 11 having a flange 12 adapted to be engaged by the flange 13 ofan air flanges being secured together by bolts 15 as clearly shown in Fire 1.

The air pipe 14 as an open end which is adapted to be connected to asuitable warm air supply and is provided with oppositely disposed airinlets 16 which are closed y a shutter 17 in the form of a split collarhaving opening -18 ada d to register with the openings 16, sai

collar beln mounted between spaced circumferentia I fla s. 19 formed onthe pipe 14, the ends of t e shutter bein secured together by a bolt 20so asto 100 the shutter in its adjusted position. By this constructionthe size of the air inlets can be increased or diminished, and in usein, mid summer 0 en and weather the air inlets are entirel in mid winterweather are entire y osed.

A horizontall v disposed rejection is pipe 1 14, said formed'in the b0 yortion of t e carburetor:

forming a bottom or the mixing chamber and is provided with a verticallydi osed bore 37 in which is mounted a Venturl tube 38, said horizontallydisposed projection being arranged above a' by-pass 39 which i xtendsfrom the air inlet 11 as shown in i e 2. I

e air tube 11 is closed at its inner end by a suction-controlled valve54 carried b a valve stem 55 which has one of its en extended into a box56 formed integral with provided with an internally threaded opening 57and in its bot the body on one side as shown in Figs. 1-, 2 and 3. Thebox is tom is mounted a hollow plug 58 having an V externally threadedportion working the threaded bore 57 for adjustin the positlon of thehollow plug, said p ug having a milled head 59 which is engaged by aspring 60 for holding the plug in its adjusted position.

Arranged within the plug is a coil spring 61 which has its upper endarranged over a positioning pin 62 carried by a rock arm 63 secured onthe outer end of the valve stem 55, said spring normally holding the armin raised position so as to hold the suctioncontrolled valve closed soas to completely close the air inlet 11. The box 56 is provided witharemovable cover 65 in order to allow the parts to be removed and takenapart for repairing.

In order to provide means for increasing the richness of the mixture forstarting purposes I provide the air pipe 14 with a choker valve notshown carried by a valve stem 67 which extends out through the pipe andis provided with an arm 68 forming means for connecting a rod or wireextending from the dash so as to close the valve, The valve is normallyheld open by a coil spring surrounding the stem having one of its endsconnected to the frame and the opposite end to a stop pin 69 formed onthe pipe 11 which limitsthe movement of the arm so as to hold the chokervalve in open position at all times. In starting the engine the operatoroperates the valve control on the dash so as to close the same whichincreases the vacuum so as to draw into the cylinder a rich mixture fromthe mixing chamber.

From the above description it will be seen that I have provided acarburetor with an air pipe having a shutter controlled air inlet bymeans of which air can be taken directly into the carburetor inconnection with the suction-controlled valve normally held closed.Itwill also be seen that the air inlet of the carburetor is connected tothe mixing chamber thereof by a bypass in which is arranged a Venturitube carrying a working nozzle for supplying fuel to the motor underordinary conditions.

I claim:

1. A carburetor comprising a casing having a suction controlled valvemounted therein, a pivoted valve stem upon which said valve is mounted,extending through the walls of said casing, an integral housing formedon said easing into which one end of said valve extends, an arm mountedon said stem within said housing, an adjustable support arranged Withinsaid'honsin'g and a coiled spring carried by said adjustable supportengaging said arm.

2. A carburetor comprising a casing ha"- ing an integral housing, avalve stem extending throu h the walls of said casing having one en.arranged within said housing, a suction controlled valve carried bysaid valve stem,'an arm fixed on said stem within said housing having apin at its free end, said housing being provided with a threadedopening, a hollow plug working in said threaded opening, said plu havinga milled head and a spring arrange within said hollow plug having itsfree end arranged over the pin of said arm for retarding the movementthereof.

In testimonyl whereof I hereunto'aflix my signature in t e presence oftwo witnesses.

ALBERT e. REDMOND.

Witnesses:

H. M. MCCORMAOH. LUOIAN PAULEY.

